Think it derives from the similar terms "rich man's family" or "choix du roi"
One son--to inherit and rule the estate...no brothers are needed to work the fields or run the business (because you're rich) so best deal is not to have second and third sons who will not receive a birthright and will skulk around, envious, making trouble
One daughter--to marry a powerful ally's son and spread your power and influence
family of origin
The term "sand dollar" refers to any animal in the order Clypeasteroida which includes several different families.
River City refers to a shutdown of outside information and/or contact when there has been a militry fatality to prevent word of the death from leaking out before the family is notified. Don't know the origin of the term
A fin (short for "finnif") is slang for a five-dollar bill. It is derived from the Yiddish word for "five" ("finf").
greek is the origin of oceanography
lahar is the term for mass movement that is volcanic in origin
A dollar.
The term is etymology.
Glacial drift is the term for all sediments of glacier origin.
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The dinosaurs commonly referred to as "raptors" were in a family known as dromaeosaurids. These dinosaurs first appeared about 165 million years ago and died out 65.5 million years ago along with the rest of the non-avian dinosaurs. Velociraptor, the dinosaur which popularized the term "raptor" for this family lived from 75 million to 71 million years ago.